myvscalais
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- vs calais 5.0L
Had my VS Calais V8 rebuilt about 2 months ago and it was slightly surging when sitting on about 95kmh, only when coasting not under acceleration etc and I told the bloke that rebuilt it.(wife's sisters husband, aka family mechanic, by trade)
He came over and checked the timing which was out about 5 deg, he said he couldn't check it properly after he first got it going because his timing light was stuffed, but I think he retarded it on purpose until I ran it in properly
He set up the timing again and all was fine for about 3 weeks, (and boy does she go) until yesterday.
Driving at 100kmh engine died and would not restart. Got it tray trucked home and done some checking was found to have no spark from the coil. The bloke that rebuilt it changed the coil because it died on him when he first took it for a drive, it had cracks in it etc. I had doubts it would be the coil again as it was only 2 months old but I had a spare at home so decided to try that first even though he said it would be the ignition module. What would he know he's only a mechanic lol.. (replacing v8 coil = prick of a job) Still the same.
Rang around for prices of an ignition module, god damn expensive found a changeover for $188 from Bursons. Put that in no worries, started and running no problems, BUT the surging is back probably worse than before. Again only while coasting up around 100kmh.
Because I replaced the coil and the ignition module do you think I should check the base ignition timing again, or does it sound like a dodgy plug or lead (which are all new) There is no miss at idle and coasting at low speeds is ok.
The slightest touch of the accelerator the surging disappears it's only there when holding one speed between 90 - 110kmh.
I might have disturbed one of the leads on the dizzy when I changed the coil but wouldn't it be rough on idle if a lead or plug is dodgy or could it be breaking down on higher speeds?
The base timing should be set at 10 btdc with diagnostic pins bridged but is this set at idle speeds? It seemed to go away after he set the base timing last time. It's got a slightly larger cam in it now from standard, does the timing stay the same?
Got me puzzled everything is new, fuel filter, air filter, plugs, leads, coil, ignition module, injectors professionally cleaned and tested.
No fault codes being generated only #12 continuously.
Apart from this surging the car is running perfect but it is annoying the **** out of me. I don't want to ask him to come and check it as he lives a couple hundred K from me and I can get hold of a timing light myself but just need to know if the timing is set on idle or should I be looking somewhere else for the problem. After I changed the ignition module and first started the car it was idling like a pig for about a minute then settled down and came good.
Any thoughts, ideas or suggestions welcome.
Thanks everyone.
He came over and checked the timing which was out about 5 deg, he said he couldn't check it properly after he first got it going because his timing light was stuffed, but I think he retarded it on purpose until I ran it in properly
He set up the timing again and all was fine for about 3 weeks, (and boy does she go) until yesterday.
Driving at 100kmh engine died and would not restart. Got it tray trucked home and done some checking was found to have no spark from the coil. The bloke that rebuilt it changed the coil because it died on him when he first took it for a drive, it had cracks in it etc. I had doubts it would be the coil again as it was only 2 months old but I had a spare at home so decided to try that first even though he said it would be the ignition module. What would he know he's only a mechanic lol.. (replacing v8 coil = prick of a job) Still the same.
Rang around for prices of an ignition module, god damn expensive found a changeover for $188 from Bursons. Put that in no worries, started and running no problems, BUT the surging is back probably worse than before. Again only while coasting up around 100kmh.
Because I replaced the coil and the ignition module do you think I should check the base ignition timing again, or does it sound like a dodgy plug or lead (which are all new) There is no miss at idle and coasting at low speeds is ok.
The slightest touch of the accelerator the surging disappears it's only there when holding one speed between 90 - 110kmh.
I might have disturbed one of the leads on the dizzy when I changed the coil but wouldn't it be rough on idle if a lead or plug is dodgy or could it be breaking down on higher speeds?
The base timing should be set at 10 btdc with diagnostic pins bridged but is this set at idle speeds? It seemed to go away after he set the base timing last time. It's got a slightly larger cam in it now from standard, does the timing stay the same?
Got me puzzled everything is new, fuel filter, air filter, plugs, leads, coil, ignition module, injectors professionally cleaned and tested.
No fault codes being generated only #12 continuously.
Apart from this surging the car is running perfect but it is annoying the **** out of me. I don't want to ask him to come and check it as he lives a couple hundred K from me and I can get hold of a timing light myself but just need to know if the timing is set on idle or should I be looking somewhere else for the problem. After I changed the ignition module and first started the car it was idling like a pig for about a minute then settled down and came good.
Any thoughts, ideas or suggestions welcome.
Thanks everyone.